My two cents: I think such squabbling is unfortunate, but, hey, there was "much disputing" in the book of Acts too . . .
I agree wholeheartedly with the OP's burden: I think he sees many who only "profess" Christ and do not work diligently in His kingdom. Our world today is a sad place: more and more are getting caught in the Devil's many threads of lust, greed, sports, drink, fame, money, and all other kinds of substitutes instead of Jesus Christ. Less and less are living wholeheartedly for the kingdom of God!
But I do think it is unfortunate that he used this title:
Remaining Obedient Secures Eternity
I do not think that the Scriptures given (or any Scriptures) teach that it is works or obedience that secures eternity. We are saved by grace through faith and we stay saved by grace through faith. Then God's grace through our faith produces God's workmanship in us!
Often the issue is that different people from different backgrounds say things differently and react to different ways of saying things. That may be part of what is happening here.
That was my two cents: Now here is my five cents: nickel!
I highly respect many here who believe in OSAS, but I disagree with that belief. If OSAS is true, it makes works irrelevant and unnecessary to get to heaven. Most (maybe all?) who believe in OSAS here believe in discipleship, teach discipleship, and live discipleship.
So I will come out saying that works are included in the picture and are relevant to continue to stay saved and to get to heaven. But it is not the works that secures salvation or maintains salvation, but it is grace through faith.
We are not saved by "faith alone" - such a thing does not exist - we are saved by a faith that evidences itself in our works.